Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1995 Aboveground biomass data

• Format: Dataset
• Language: unknown
• Published: 1997
• Subjects: Cedar Creek Natural History Area; Long Term; Ecology; Successional dynamics; Primary Productivity; Disturbance Patterns; Nutrient Budgets; Nutrient Cycles; Climatic Variation; Biodiversity; Ecosystem functioning; Nitrogen limitation; Fire Frequency; Plant Competition; MOSSES & LICHENS; MISCELLANEOUS LITTER; AGROPYRON REPENS; SCHIZACHYRIUM SCOPARIUM; POA PRATENSIS; ANEMONE CYLINDRICA; ACHILLEA MILLEFOLIUM(LANULOSA); ERIGERON CANADENSIS; ARABIS DIVARICARPA; PANICUM PERLONGUM; BERTEROA INCANA; PANICUM OLIGOSANTHES; PANICUM PRAECOCIOUS; MONARDA FISTULOSA; LYCHNIS ALBA; POLYGONUM CONVOLVULUS; CHENOPODIUM ALBUM; FORB SEEDLINGS; CYPERUS SP; RUDBECKIA SEROTINA; OENOTHERA BIENNIS; ERIGERON STRIGOSUS; ASCLEPIAS SYRIACA; SILENE ANTIRRHINA; HEDEOMA HISPIDA; POTENTILLA RECTA; SETARIA LUTESCENS (GLAUCA); PENSTEMON GRACILIS; TRAGOPOGON DUBIUS (MAJOR); FUNGI; CHENOPODIUM SP; AMBROSIA ARTEMISIIFOLIA ELATIOR; LESPEDEZA CAPITATA; MISCELLANEOUS HERBS; EQUISETUM LAEVIGATUM; SORGHASTRUM NUTANS; SOLIDAGO NEMORALIS; RUMEX ACETOSELLA; PHYSALIS HETEROPHYLLA; BURNT MOSS; HIERACIUM LONGIPILUM; ANDROPOGON GERARDI; CAREX SP; AGROSTIS SCABRA; SOLIDAGO RIGIDA; GNAPHALIUM OBTUSIFOLIUM; PHYSALIS VIRGINIANA; ARISTIDA SP; ERAGROSTIS SPECTABILIS; LIATRIS ASPERA; DIGITARIA SANGUINALIS; ROSA ARKANSANA; RUBUS SP; ARTEMISIA LUDOVICIANA; LITHOSPERMUM CAROLINIENSE; VIOLA PEDATIFIDA; EUPHORBIA COROLLATA; AMBROSIA CORONOPIFOLIA; ASCLEPIAS TUBEROSA; LITHOSPERMUM CANESCENS; TRADESCANTIA OCCIDENTALIS; ASTER ERICOIDES; ASTER AZUREUS; LACTUCA SP; APOCYNUM ANDROSAEMIFOLIUM; OXYBAPHUS HIRSUTUS; CAMPANULA ROTUNDIFOLIA; CHENOPODIUM LEPTOPHYLLUM; SISYRINCHIUM CAMPESTRE; STIPA SPARTEA; LATHYRUS VENOSUS; HELIANTHEMUM BICKNELLII; VICIA VILLOSA; POLYGONUM TENUE; MISCELLANEOUS GRASSES; POLYGALA POLYGAMA; ARTEMISIA (CAUDATA) CAMPESTRIS; CALAMAGROSTIS CANADENSIS; QUERCUS MACROCARPA; STACHYS PALUSTRIS; SOLIDAGO GRAMINIFOLIA; HELIANTHUS LAETIFLORUS; HELIANTHUS GIGANTEUS; SPOROBOLUS CRYPTANDRUS; RHUS GLABRA; RANUNCULUS RHOMBOIDEUS; COREOPSIS PALMATA; QUERCUS SP; PANICUM VIRGATUM; COMANDRA RICHARDSIANA; ASCLEPIAS SP; LEERSIA ORYZOIDES; PRUNUS SP; MUHLENBERGIA RACEMOSA; CAREX PENSYLVANICUS; CYPERUS SCHWEINITZII; PARTHENOCISSUS INSERTA; SOLIDAGO SP; VIOLA SAGITTATA; TARAXICUM OFFICINALIS; ASTER SIMPLEX; Cedar Creek; Giganteus; Recta; Saint-Paul; Campanula rotundifolia
• Online Access: http://hdl.handle.net/10255/dryad.29021; http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.799501.2/xml

The purpose of this experiment is to measure how adding nitrogen over a long time will affect the number of species, the type of species present, the amount of annual growth, and the change from year to year in the growth of each species in a plant community which is also relieved of grazing by large and small mammals. The experiment is being conducted within fields (A, B, C, and D) which were initially low in soil nutrients. There are 8 different levels of nitrogen addition with other nutrients added to ensure that nitrogen remains the limiting nutrient, and a control which receives no nutrients. There are 6 replicates of the 9 treatments in fields A, B, and C and 5 replicates in field D. The treatments were randomly assigned to the plots. In fields A, B, and C the plots are in 6 by 9 grid and are 4 by 4 meters in size with 1 meter aisles between plots. In field D the plots are 1.5 by 4 meters and are placed in a 3 by 17 grid. The plots are enclosed by a fence to keep out mammalian herbivores. Gophers are trapped and removed as they appear. Nitrogen fertilizer (NH4NO3) is applied twice per year, once in early May and once in late June. This experiment was begun in 1982 by David Tilman.